Gauge



w.' as, 1924.

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BRYANT H. BLOOD, OF HARTFORD, CONNECTICUT, Ass'rGNoR To PRATT a WHITNEY l COMPANY, or NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

GAUGE.

Application led January 26, 1921. Seria/1 No. 440,088.

, To all whom t may come-rn.'

Be it known that I, BRYANT H. BLOOD, a'

`citizen of the United States, residing at Hartford, in the county of Hartford and State of'Connecticut, have invented certain new and useful Improvements in Gauges, of which the following is a specification.

This invention relates to gauges andv particularly to plug gauges preferably of the go and not go type adapted to measure circular openings to determine accurately when such openingsv are of a predetermined dimension. .I It is the primary object of the invention to provide an improved gauge' of 16 this general type.

- It is an object of the invention to provide simple and improved means for rigidly securing the gagmg heads to the gauge handle and for preventing relative rotation and 20 looseness between the gaging heads and handle. f

Another object of the invention is to provide a gauge of the type defined comprising few and simple parts adapted to be easily manufactured and assembled with a minimum of time. and expense and providing, when assembled, a gauge' of a very rigid and substantial character.

A further object of the invention is to provide a. gauge having a reversible gaging head and improved means whereby the head may be quickly and easily detached from and attached to the gauge in either of two reversible positions.

lVith the above and other Objects in view (proceeds,

by refas will appear as the description the invention will now be describe erence to the drawing wherein:

Figure l is a broken side view of a double 4o end plug gauge, the ends thereof being shown in section.

Fig. 2 is a view similar to Fig. 1, the gaging heads however being adapt/ed to measf ure the root and apex diameters of a threaded Opening.

Fig..3 is an end view of one heads shown in Fig. 1.

Fig. 4 is an end View of the gauge handle.

Fig.l 5 is a fragmentary sideelevation thereof.

Fig. 6 is a longitudinal sectional view through a modified form of gaging head.

of the gaging Fig. 7 is a erspective end view thereof.`

Fig. 8 is Aa ragmentary perspective View Of the gauge handle used therewith.

In gauges of the type defined, ease and simplicity'of manufacture and rigidity of parts are of primary importance. 'These 4and other. improvements are outstanding fea'- tures of the present invention. The gauge herein comprises a minimum number "of parts, asga handle, gaging heads and means for'securing the heads to the handle, and

- usual wear and tear and of performing the desired function with accuracy. Itl will be noted that further improved and simple means comprising interengaging projections and recesses between the gaging heads and- -the gauge handle are provided for prevent- Ving rotation of the heads relative to the handle. The .invention as herein illustrated and described shows certain preferred forms such parts, as illustrated, are fashioned in thereof, it being understood,however, that modifications Within the scope of the appended claims may be made without departv ing from the spirit of the invention.

Referring more specifically to 'the'drawing2 1 designates the auge handle, illustrat y ed 1n Fig. 1 as provi ed at the`ends thereof with a pair of cylindricaf gaging heads 2 and 3 of the go and not go. type respectively. Each Of vthese heads' is preferably provided with a recess in each end thereof1 the recesses 4 in the go head being deeper than the-'recesses 5 in the not go, head. Each of the two recesses 4 and the two recesses 5 are identical whereby either recess is adapted t'ofit over the end of the gauge handle, thereby making the heads reversible. The heads are secured t0 the handle by means of bolts 6 and 7 respectively engag ing in openings 8 and 9 inthe gaging heads 2 and 3 and threading into the handle ends at 10 and 11.

The gauge heads are prevented from ro-'V tation and looseness relative to the handlebyv The' projections are preferablyl dle.

' invention has ing or other shape as desired. As illustrated in the drawing, ll preferably provide thre`e such projections and recesses whereby a tripod support is formed for 'firmly seating the head against the handle. 'llhe boltsl 6 and 7 are made to provide a loose it either within the handle or head whereby the head is held loosely thereby relative to the han- `lln the drawing, ll have referred to illustrated a slight clearance etween the head and the parts engaged thereb With such a construction, each bolt is a apted to draw its head into engagement 'with the handle with the three projections seating firmly with a tripod support in the three recesses. When so secured, the heads are held against any looseness on the handle. llt will be noted that the bolt head- 6 is seated tiush within the go head 2 whereby the gauge may be stood upright on such end.

rllhe gauge illustrated in Fig. 2 is substan- 'tially the same asthat shown in Fig. 1, the

only difference being that a thread gaging head 14 and a corresponding cylindrical gaging head 15 has been substituted for the heads 2 and 3. rllhev heads 14 and 15 are adapted to. gauge the threads of a threaded opening at the root and apices thereofhrespectively. 1t should be understood that Figs. 1 and '2 illustrate onlyl two of the several gauge combinations possible with the gauge construction comprisingC this invention.v

lln'Fi s. 6, 7 and 8 is illustrated a modified form o the invention wherein a pair of straight sided lugs or roj ect-ions is provided on the gauge handle or engaging a pair ot' corresponding recesses in the gaging head: 1n this form. of the invention the gaging vhead 16 is providedl with yannular shoulders 17 in the bore adjacent each end thereof. At diametrically opposite points these shoulders are cut out vto provide recesses 18 adapted to be engaged by projections 19 on the gauge handle. rl"his construction is otherwise substantially that shown in Fig. 1, the heads being adapted to be mounted on the handle by means of bolts, as the bolts Gand 7, and being prevented from rotation relative to the handle by means of the inter-` engaging lugs and recesses 18=and 19. From' the above description it will be.

seen that the auge'comprising the present en reduced to the most extreme simplicity in form and manufacture conducive to the'production of a gauge havving the necessary features required to pervform the desired function. rllhe gauge comprises broadly a handle, gaging heads, and securing means therefor. The gaging heads are reversible and the securing vmeans are adapted for quick and easy operation to remove the gaging heads from, and secure the s'ame to the handle. The improved j' means, comprising the projections 12 and 19,

nordica v for securing the gaging heads against rotation relative tothe handle, is extremely simple and such projections can beeasily formed on the handle with-a minimum of time and expense. lt should be understood, however, that the projections 12 and recesses 413 are of such relative shapes that the projections wedge tightly within the recesses.

Modificationsf the invent-ion within the scope of the appended claims are considered as Within the-scope of the invention.

`What ll claim is:

1. ln a gauge, the combination of a handle, a gaging head adapted to be mounted thereon with one end of the head abutting against one end 'of the handle,- three projections on one of the said ends engaging three cooperating recesses in the other end for preventing relative rotation'oif such members, and means for holdino` the head securely seated yon the handle with the three projections tightly engaged with a tripod efiect in the three recesses.

2. In a gauge, the combination of a handle, a. gaging head adapted to be mounted thereon with oneend of the head abutting against one end of the handle, three wedge-shaped projections on the said end of the handle for engaging cooperating recesses in the end of the head with a tripod effect for preventing relative rotation and looseness of such members, andmeans for securing the head to the handle with the projections engaged within the recesses.

3. lirn a gauge, the combination of a handle, Ia gaging head adapted to be mounted on one end thereof with one; end of the ed means extending through one opening v and threadedly engaging within the other opening to secure the head to the handle with the projection wedged within the recess.

4. lin a gauge, the combination of a handle, a gaging head adapted to be mounted thereon with one ,end of the head abutvting aga/inst one end of the handle, the abutting end of the head being c ountersunk and provided with three relatively vspaced recesses in the bottom thereof, three projections on the handle end4 for engaging within the recesses', and screw threaded means tor securing the head to the handle with the projections engaged with a tripod eect within *the recesses. I

5. ln a gauge, the combination of a, handle, a gaging head adaptedv to be mounted thereon with one end of the head abutadapted to be prevented by means comprising a plurality of inter-engaging projections and recesses on the; said .abutting ends, one of such means being V-shaped whereby to provide a wedging action, and means for holding the head securely seated on the handle with the projections tightly wedged in the recesses.'

6. In a gauge, the combination of a handle, ya gaging head adapted to be/ mounted thereon with one end of the head abutting against one end of the handle, rotation or looseness of the head on the handle being adapted to be 'prevented by means compris-I ing three inter-engaging projections and recesses on the said abutting ends and pro- 4 ducing a tripod engagement between the head and handle, one 0f such meansv being V-shaped and extending approximately in a radial direction whereby to provide a wedging action, and means for holding the head securely seated on the handle with the projections tightly wedged Within the recesses. In a gauge, the combination of a handle, a reversible gaging head adapted to be mounted on the handle with either end thereof abutting against the handle end, inter-engaging projection and recess means between .thehandle end and either gaging Vhead end for preventing relative rotation of such members, the relative shapes of such means being such that 'their cooperation forms a wedge lock preventing looseness of the head on the handle, and screw threaded means for securing the hea-d to the handle with the projection and recess means in tight engagement.

8. In a gauge, lthecombination of a handle, a reversible gag'ingfhead adapted to be mounted on the handle with either end thereof abutting against the handle end, ya plurality of )rojections on the said end of the handle tor engaging'cooperating recesses in eitherend of the head for preventing relative rotation of such members, the relative shapes of the projections and recesses'being such that the projections are wedged into the recesses in a manner preventing looseness of the head on the handle,

and means for securing the head to the handle with the projections and recesses in tight engagement.

9. In a gauge, the 'combination of a handle, a reversible gaging head adapted to be mounted on the handle with either end thereof abutting against the handle end, three wedge-shaped projections on the said end of the handle, the gagingl head ends each being provided with three re-l cesses adapted to cooperate with Vthe projections on the handle, and means for securing the head to the handle with either end r in engagement with the handle end and the end, the gaging head and handle having y aligned openings,l lthree inter-engaging projections and resses between the end of the handle and the other end of the gaglng head for forming a tripod connection to,`

prevent relative rotation and looseness of such members, and a bolt extending through the opening in the head and threadedly engaging within the opening in the handleto secure the same to the handle with the projections and recesses in tight engagement.

11. In a gauge, the combination of a handle, a reversible gaging head adapted "to be mounted on the handle with either end thereof abutting against the handle end, the gaging head and handle having aligned openings and the ends of the'gaging head being countersunk about the openings therein, 4Miter-engaging projection and recess means between the end of the handle' and the bottoms ofthe countersinks for preventinorelative 'rotation 'of such 'members`,

- and abbolt extending through the opening in the head and threadedly engaging within the openinv in the handle to secure the same to the han le with the projection and recess means in. tight engagement.

12. In a gauge, the combination of a handle, a reversible gaging head adapted to be mounted on the handle with either end thereof abutting against the handle end, the gaging head and handle having aligned openings and the ends of the gaging head being countersunk about the opening therein, a bolt extending through the opening in the head and havingits head engaging in the outery countersink of the engaging within the opening in the handle to secure the vgaging head to thehandle, and l projections on Ithe end of the handle adapted to engage recesses in the bottom of the inner countersink for preventing the relative rotation of such members. j l

13. As an article of manufacture, a gag- .ing head adapted to be mounted on the end of a gauge handle, the head being provided with a plurality of V-shaped recesses in one end thereof adapted to abut against l and cooperate with engaging projections on the handle end for preventing relative rotation or looscness of the head 'on the handle.

14. v As an article of manufacture, a reversible gaging head adapted to be mounted on the end cfa gauge handle with either isend thereof abutting against the handle end, the head being provided with three recesses in each end thereof adapted to abut against and cooperate with three projections on the handle end to form a tripod engagement cooperate vwith three projections on the therewith for preventing relative rotation handle end to form a tripod engagement l@ or looseness of the head on the handle. therewith for preventing relative rotation 15.. As an article of manufacturea a gagor looseness of the head on the handle.

ing head adapted to be mounted on the end ln testimony' whereof, l hereto ahx my of a gauge handle, the head beingprovided signature.

with three radial V-shaped recesses in one end thereof adapted to abut against and BRYANT H. BLOOD. 

